how to reattach USB thing after safely ejecting?

view story

http://unix.stackexchange.com – So, you just ejected your SD card with the 'safely eject' option. (in my case in palimpsest GUI). Then you proceed with your deeds that required the device out of the computer, and are ready to insert it again. you plug it in... and nothing happens. What should i do for the system to recognize the device again in software? i know i can attach to another usb port, but that's just dumb. Specially if you are talking about a card reader permanently attached and just safely ejected a media. in steps, for the worst scenario: insert card reader insert SD card linux mount card use card. safely ej (HowTos)